Revert of Updating OTS repo from https://github.com/khaledhosny/ots.git

third_party/ots/src/name.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "name.h"
-
-#include <algorithm>
-#include <cstring>
-
-#include "cff.h"
-
-// name - Naming Table
-// http://www.microsoft.com/typography/otspec/name.htm
-
-#define TABLE_NAME "name"
-
-namespace {
-
-bool ValidInPsName(char c) {
-  return (c > 0x20 && c < 0x7f && !std::strchr("[](){}<>/%", c));
-}
-
-bool CheckPsNameAscii(const std::string& name) {
-  for (unsigned i = 0; i < name.size(); ++i) {
-    if (!ValidInPsName(name[i])) {
-      return false;
-    }
-  }
-  return true;
-}
-
-bool CheckPsNameUtf16Be(const std::string& name) {
-  if ((name.size() & 1) != 0)
-    return false;
-
-  for (unsigned i = 0; i < name.size(); i += 2) {
-    if (name[i] != 0) {
-      return false;
-    }
-    if (!ValidInPsName(name[i+1])) {
-      return false;
-    }
-  }
-  return true;
-}
-
-void AssignToUtf16BeFromAscii(std::string* target,
-                              const std::string& source) {
-  target->resize(source.size() * 2);
-  for (unsigned i = 0, j = 0; i < source.size(); i++) {
-    (*target)[j++] = '\0';
-    (*target)[j++] = source[i];
-  }
-}
-
-}  // namespace
-
-
-namespace ots {
-
-bool ots_name_parse(OpenTypeFile* file, const uint8_t* data, size_t length) {
-  Buffer table(data, length);
-
-  OpenTypeNAME* name = new OpenTypeNAME;
-  file->name = name;
-
-  uint16_t format = 0;
-  if (!table.ReadU16(&format) || format > 1) {
-    return OTS_FAILURE_MSG("Failed to read name table format or bad format %d", format);
-  }
-
-  uint16_t count = 0;
-  if (!table.ReadU16(&count)) {
-    return OTS_FAILURE_MSG("Failed to read name count");
-  }
-
-  uint16_t string_offset = 0;
-  if (!table.ReadU16(&string_offset) || string_offset > length) {
-    return OTS_FAILURE_MSG("Failed to read strings offset");
-  }
-  const char* string_base = reinterpret_cast<const char*>(data) +
-      string_offset;
-
-  NameRecord prev_record;
-  bool sort_required = false;
-
-  // Read all the names, discarding any with invalid IDs,
-  // and any where the offset/length would be outside the table.
-  // A stricter alternative would be to reject the font if there
-  // are invalid name records, but it's not clear that is necessary.
-  for (unsigned i = 0; i < count; ++i) {
-    NameRecord rec;
-    uint16_t name_length, name_offset = 0;
-    if (!table.ReadU16(&rec.platform_id) ||
-        !table.ReadU16(&rec.encoding_id) ||
-        !table.ReadU16(&rec.language_id) ||
-        !table.ReadU16(&rec.name_id) ||
-        !table.ReadU16(&name_length) ||
-        !table.ReadU16(&name_offset)) {
-      return OTS_FAILURE_MSG("Failed to read name entry %d", i);
-    }
-    // check platform & encoding, discard names with unknown values
-    switch (rec.platform_id) {
-      case 0:  // Unicode
-        if (rec.encoding_id > 6) {
-          continue;
-        }
-        break;
-      case 1:  // Macintosh
-        if (rec.encoding_id > 32) {
-          continue;
-        }
-        break;
-      case 2:  // ISO
-        if (rec.encoding_id > 2) {
-          continue;
-        }
-        break;
-      case 3:  // Windows: IDs 7 to 9 are "reserved"
-        if (rec.encoding_id > 6 && rec.encoding_id != 10) {
-          continue;
-        }
-        break;
-      case 4:  // Custom (OTF Windows NT compatibility)
-        if (rec.encoding_id > 255) {
-          continue;
-        }
-        break;
-      default:  // unknown platform
-        continue;
-    }
-
-    const unsigned name_end = static_cast<unsigned>(string_offset) +
-        name_offset + name_length;
-    if (name_end > length) {
-      continue;
-    }
-    rec.text.resize(name_length);
-    rec.text.assign(string_base + name_offset, name_length);
-
-    if (rec.name_id == 6) {
-      // PostScript name: check that it is valid, if not then discard it
-      if (rec.platform_id == 1) {
-        if (file->cff && !file->cff->name.empty()) {
-          rec.text = file->cff->name;
-        } else if (!CheckPsNameAscii(rec.text)) {
-          continue;
-        }
-      } else if (rec.platform_id == 0 || rec.platform_id == 3) {
-        if (file->cff && !file->cff->name.empty()) {
-          AssignToUtf16BeFromAscii(&rec.text, file->cff->name);
-        } else if (!CheckPsNameUtf16Be(rec.text)) {
-          continue;
-        }
-      }
-    }
-
-    if ((i > 0) && !(prev_record < rec)) {
-      OTS_WARNING("name records are not sorted.");
-      sort_required = true;
-    }
-
-    name->names.push_back(rec);
-    prev_record = rec;
-  }
-
-  if (format == 1) {
-    // extended name table format with language tags
-    uint16_t lang_tag_count;
-    if (!table.ReadU16(&lang_tag_count)) {
-      return OTS_FAILURE_MSG("Failed to read language tag count");
-    }
-    for (unsigned i = 0; i < lang_tag_count; ++i) {
-      uint16_t tag_length = 0;
-      uint16_t tag_offset = 0;
-      if (!table.ReadU16(&tag_length) || !table.ReadU16(&tag_offset)) {
-        return OTS_FAILURE_MSG("Faile to read tag length or offset");
-      }
-      const unsigned tag_end = static_cast<unsigned>(string_offset) +
-          tag_offset + tag_length;
-      if (tag_end > length) {
-        return OTS_FAILURE_MSG("bad end of tag %d > %ld for name entry %d", tag_end, length, i);
-      }
-      std::string tag(string_base + tag_offset, tag_length);
-      name->lang_tags.push_back(tag);
-    }
-  }
-
-  if (table.offset() > string_offset) {
-    // the string storage apparently overlapped the name/tag records;
-    // consider this font to be badly broken
-    return OTS_FAILURE_MSG("Bad table offset %ld > %d", table.offset(), string_offset);
-  }
-
-  // check existence of required name strings (synthesize if necessary)
-  //  [0 - copyright - skip]
-  //   1 - family
-  //   2 - subfamily
-  //  [3 - unique ID - skip]
-  //   4 - full name
-  //   5 - version
-  //   6 - postscript name
-  static const uint16_t kStdNameCount = 7;
-  static const char* kStdNames[kStdNameCount] = {
-    NULL,
-    "OTS derived font",
-    "Unspecified",
-    NULL,
-    "OTS derived font",
-    "1.000",
-    "OTS-derived-font"
-  };
-  // The spec says that "In CFF OpenType fonts, these two name strings, when
-  // translated to ASCII, must also be identical to the font name as stored in
-  // the CFF's Name INDEX." And actually, Mac OS X's font parser requires that.
-  if (file->cff && !file->cff->name.empty()) {
-    kStdNames[6] = file->cff->name.c_str();
-  }
-
-  // scan the names to check whether the required "standard" ones are present;
-  // if not, we'll add our fixed versions here
-  bool mac_name[kStdNameCount] = { 0 };
-  bool win_name[kStdNameCount] = { 0 };
-  for (std::vector<NameRecord>::iterator name_iter = name->names.begin();
-       name_iter != name->names.end(); name_iter++) {
-    const uint16_t id = name_iter->name_id;
-    if (id >= kStdNameCount || kStdNames[id] == NULL) {
-      continue;
-    }
-    if (name_iter->platform_id == 1) {
-      mac_name[id] = true;
-      continue;
-    }
-    if (name_iter->platform_id == 3) {
-      win_name[id] = true;
-      continue;
-    }
-  }
-
-  for (uint16_t i = 0; i < kStdNameCount; ++i) {
-    if (kStdNames[i] == NULL) {
-      continue;
-    }
-    if (!mac_name[i]) {
-      NameRecord rec(1 /* platform_id */, 0 /* encoding_id */,
-                     0 /* language_id */ , i /* name_id */);
-      rec.text.assign(kStdNames[i]);
-      name->names.push_back(rec);
-      sort_required = true;
-    }
-    if (!win_name[i]) {
-      NameRecord rec(3 /* platform_id */, 1 /* encoding_id */,
-                     1033 /* language_id */ , i /* name_id */);
-      AssignToUtf16BeFromAscii(&rec.text, std::string(kStdNames[i]));
-      name->names.push_back(rec);
-      sort_required = true;
-    }
-  }
-
-  if (sort_required) {
-    std::sort(name->names.begin(), name->names.end());
-  }
-
-  return true;
-}
-
-bool ots_name_should_serialise(OpenTypeFile* file) {
-  return file->name != NULL;
-}
-
-bool ots_name_serialise(OTSStream* out, OpenTypeFile* file) {
-  const OpenTypeNAME* name = file->name;
-
-  uint16_t name_count = static_cast<uint16_t>(name->names.size());
-  uint16_t lang_tag_count = static_cast<uint16_t>(name->lang_tags.size());
-  uint16_t format = 0;
-  size_t string_offset = 6 + name_count * 12;
-
-  if (name->lang_tags.size() > 0) {
-    // lang tags require a format-1 name table
-    format = 1;
-    string_offset += 2 + lang_tag_count * 4;
-  }
-  if (string_offset > 0xffff) {
-    return OTS_FAILURE_MSG("Bad string offset %ld", string_offset);
-  }
-  if (!out->WriteU16(format) ||
-      !out->WriteU16(name_count) ||
-      !out->WriteU16(static_cast<uint16_t>(string_offset))) {
-    return OTS_FAILURE_MSG("Failed to write name header");
-  }
-
-  std::string string_data;
-  for (std::vector<NameRecord>::const_iterator name_iter = name->names.begin();
-       name_iter != name->names.end(); name_iter++) {
-    const NameRecord& rec = *name_iter;
-    if (string_data.size() + rec.text.size() >
-            std::numeric_limits<uint16_t>::max() ||
-        !out->WriteU16(rec.platform_id) ||
-        !out->WriteU16(rec.encoding_id) ||
-        !out->WriteU16(rec.language_id) ||
-        !out->WriteU16(rec.name_id) ||
-        !out->WriteU16(static_cast<uint16_t>(rec.text.size())) ||
-        !out->WriteU16(static_cast<uint16_t>(string_data.size())) ) {
-      return OTS_FAILURE_MSG("Faile to write name entry");
-    }
-    string_data.append(rec.text);
-  }
-
-  if (format == 1) {
-    if (!out->WriteU16(lang_tag_count)) {
-      return OTS_FAILURE_MSG("Faile to write language tag count");
-    }
-    for (std::vector<std::string>::const_iterator tag_iter =
-             name->lang_tags.begin();
-         tag_iter != name->lang_tags.end(); tag_iter++) {
-      if (string_data.size() + tag_iter->size() >
-              std::numeric_limits<uint16_t>::max() ||
-          !out->WriteU16(static_cast<uint16_t>(tag_iter->size())) ||
-          !out->WriteU16(static_cast<uint16_t>(string_data.size()))) {
-        return OTS_FAILURE_MSG("Failed to write string");
-      }
-      string_data.append(*tag_iter);
-    }
-  }
-
-  if (!out->Write(string_data.data(), string_data.size())) {
-    return OTS_FAILURE_MSG("Faile to write string data");
-  }
-
-  return true;
-}
-
-void ots_name_free(OpenTypeFile* file) {
-  delete file->name;
-}
-
-}  // namespace
-
-#undef TABLE_NAME